After installation, you need to enable the Yonder eSIM settings so it is ready to connect.
For iOS (iPhone):
Go to Settings > Mobile Service
Under SIMs, select your newly installed eSIM (your device may automatically name it "Travel" or "Secondary," but it won’t be your 'Primary' SIM).
Toggle 'Turn on this line' to ON.
Toggle 'Data roaming' to ON (this is required for the data to work).
Go back to the previous Mobile Service page.
Tap on Mobile Data and select the eSIM.
For Android:
Open Settings and choose Networks & Internet (or Connections).
Select SIMs (or SIM Manager) and tap Yonder (your downloaded eSIM).
Toggle 'Use SIM' (or Turn On) to ON.
Toggle 'Mobile data' to ON.
Toggle 'Roaming' to ON.